CN101217558A - A business middleware service load balancing method - Google Patents

Abstract

The present invention relates to a business middleware service load balancing method. The three-layer architecture system based on the business middleware includes a foreground terminal, a middleware service for business processing and a background database, and the middleware service is composed of more than two middleware servers. The server group implementation is characterized in that: a domain name server responsible for front-end terminal domain name access is set, an access control program is run on the domain name server, and the program is used to analyze and control the front-end terminal domain name access request according to a set load balancing control strategy. The technical scheme of the present invention uses DNS technology to allocate business middleware service loads, can realize simple and flexible configuration of load balancing strategies, allocates middleware server loads according to actual needs, and improves middleware service capabilities. The invention mainly adopts software control mode, and the technical realization cost is relatively low, which is an ideal scheme for improving the performance of the service support system of the mobile service provider.

Description

A business middleware service load balancing method

technical field

The invention relates to a business middleware service load balancing method.

Background technique

The three-tier architecture system is the trend of large-scale IT industry applications. A common two-tier distributed system includes two layers: the front-end client terminal and the back-end database. The front-end terminal implements user interface processing and business logic processing, and the back-end database provides data resources. Separate the business logic from the client application and use a dedicated middleware server. The front-end terminal is connected to the middleware server, and the middleware server is connected to the database, thus evolving into a three-tier architecture system based on business middleware: front-end terminal, middleware service for business processing, and back-end database. This structure has many advantages: flexibly divide data and logic between clients and servers; facilitate modification of client or server-side logic according to business needs; separate system development and system deployment; facilitate the provision of full-process protection for distributed transactions. The characteristics of the application environment of the three-tier architecture system are that multiple servers provide services, users are widely distributed geographically, and the business processing volume is extremely large. In order to process business loads in a timely manner, middleware services often need to be implemented using a server group consisting of more than two middleware servers. Due to the inherent defects of the three-tier architecture, the existing technology cannot provide automatic switching of middleware services between multiple servers, and the switching of middleware services across servers needs to be manually modified. In particular, there is a lack of reasonable allocation of server group resources. Service capability is constrained by the inability to realize dynamic adjustment. Even if the most mature BEA TUXEDO middleware is used to establish a three-tier architecture application system based on TUXEDO business middleware, it is still unable to make breakthroughs in business middleware service performance due to the lack of load balancing methods.

Contents of the invention

The purpose of the present invention is to solve the deficiencies of the prior art and provide a method for balancing the load of business middleware services.

In order to achieve the above object, the technical solution provided by the present invention is to include a front-end terminal, a middleware service for business processing and a background database in a three-layer architecture system based on business middleware, and the middleware service adopts two or more middleware servers to form Realization of server group, set domain name server responsible for front-end terminal domain name access, run access control program on the domain name server, this program is used to analyze and control the front-end terminal domain name access request according to the set load balancing control strategy, and the load under the analysis control The balance implementation process includes the following steps: Step 1, the front-end terminal calls the middleware server domain name for business access, and initiates a middleware service call request; Step 2, the access control module analyzes the middleware server domain name according to the set load balancing control strategy , obtain the middleware server IP address through the IP address mapping relationship, and return it to the front-end terminal; step 3, the front-end terminal receives the middleware server IP address, and calls the middleware service on the corresponding server in the server group; step 4, The middleware service accesses the back-end database for business processing, and returns the processing result to the front-end terminal.

Moreover, the load balancing control strategy includes the following three aspects, the balancing access strategy is used to direct the middleware service invocation requests initiated by the foreground terminal to the middleware servers in the server group in turn, and distribute the middleware load in a balanced manner to Each middleware server; failover strategy, used to redirect the IP directed to the server to other servers that are working normally in the case of a middleware server failure, so as to realize the failover of middleware services; new strategy , which is used to dynamically add new middleware servers to the server group when adding them, and distribute the middleware load evenly within the server group.

Moreover, the load balancing control policy is stored in the domain name server in text form, and is called by the access control module.

Moreover, the access control program is technically implemented by encapsulating the WIN DNS service operation API.

Moreover, the middleware service is implemented using Tuxedo technology.

Moreover, the BOSS system for mobile service providers.

Moreover, the domain name server is connected to the BOSS system through the access router.

Moreover, two mutually prepared domain name servers are used.

The technical scheme of the invention uses the DNS technology to allocate the service load of the business middleware, which can realize load balancing and improve the service performance of the business middleware. The present invention can realize multiple functions through the domain name resolution control method, including fast switching of middleware services, taking over of middleware services to servers with failures, and dynamically adding new servers to server groups. The invention is easy to implement and has strong adaptability, not only improves the overall efficiency of the three-layer system structure system, but also provides guarantee for the stability, safety and reliability of the three-layer system structure system.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed ways

The technical solution provided by the present invention is: the three-layer architecture system based on the business middleware includes a foreground terminal, a middleware service for business processing and a background database, and the middleware service is realized by a server group composed of more than two middleware servers. Set up the domain name server responsible for the domain name access of the front-end terminal, and run the access control program on the domain name server. This program is used to analyze and control the domain name access request of the front-end terminal according to the set load balancing control strategy. The load balancing implementation process under the resolution control includes The following steps: step 1, the front-end terminal calls the domain name of the middleware server for business access, and initiates a middleware service call request; step 2, the access control module analyzes the domain name of the middleware server according to the set load balancing control strategy, and passes the IP address The mapping relationship is oriented to obtain the middleware server IP address, and returns it to the front-end terminal; step 3, the front-end terminal receives the middleware server IP address, and calls the middleware service on the corresponding server in the server group; step 4, middleware service access The background database performs business processing and returns the processing results to the front terminal. The middleware service can be realized by using Tuxedo technology. Tuxedo is a middleware product of BEA Company, which can realize transaction supervision and adjust between the client computer and the server to ensure correct transaction processing. At present, the business support system of mobile service providers widely uses BEA TUXEDO middleware, and establishes a three-tier architecture application system based on TUXEDO business middleware, such as the BOSS system of China Mobile. The business middleware service load balancing method provided by the invention is particularly suitable for such a large-scale system.

DNS is an acronym for Domain Name System, which is used to name computers and network services organized into domain hierarchies. DNS naming is used in TCP/IP networks such as the Internet to look up computers and services by user-friendly names. When a user enters a DNS name (domain name for short) in an application, the DNS service can resolve this name into other information related to it, such as an IP address. The invention utilizes the DNS technology to set up a domain name server, analyze and control the front-end terminal domain name access request through an access control program, select a suitable middleware server for the front-end terminal domain name access request, and achieve a deployment effect. During specific implementation, the domain name server needs to establish a network connection with the system in order to be responsible for the front-end terminal domain name access. Access routers are provided in existing BOSS systems to add devices to the BOSS network. The domain name server can be connected to the BOSS system through the access router to realize intercommunication with the front-end terminal equipment. It is also possible to use two mutually backup domain name servers, which can maintain 24-hour continuous operation and avoid affecting the operation of an important system such as the BOSS system that needs to maintain services day and night. Considering the cost, using other existing server equipment in the system to realize domain name resolution control without adding a dedicated domain name server should also be regarded as an equivalent replacement means within the protection scope of the present invention.

The load balancing control strategy to be followed when analyzing the control can be simply set to allocate to all middleware servers in the server group in turn, or set the specific allocation method according to the experimental results. Considering possible faults and expansions in practice, the present invention proposes a further technical solution. The load balancing control strategy includes the following three aspects: a balanced access strategy, which is used to direct the middleware service call requests initiated by the foreground terminal to the server group in turn On the middleware server in the middleware server, the middleware load is distributed to each middleware server in a balanced way; the failover strategy is used to redirect the IP directed to the server to the normal working one in the case of a middleware server failure On other servers, the failover of middleware services is realized; a new strategy is added to dynamically add new middleware servers to the server group, and the middleware load is evenly distributed within the server group. The load balancing control policy can be directly set in the access control program, but for the convenience of modification, it is recommended to store it as a configuration file on the domain name server during implementation, and the access control program is invoked according to the specific situation.

The access control program can be realized through software programming, and it can be written according to the functional requirements during specific implementation. The access control module of the embodiment of the present invention adopts the method of packaging WINDNS DNS service API to carry out programming, realizes the operation to DNS resolution control, realizes the following functions: 1, realize stop/restart DNS service function; 3, realize stop/start/add/ Query/delete DNS domain function; 4. Realize the function of adding/deleting/modifying DNS records according to the balance control strategy; 5. Realize the function of load balance control strategy.

The present invention provides specific embodiments for reference and implementation. Referring to FIG. 1 , the BOSS system of a mobile operator includes a foreground terminal, a middleware service for business processing, and a background database. Among them, the front-end terminal layer includes business terminal equipment and customer service interfaces in multiple regions; key customer interfaces, customer relationship management system (CRM) interfaces, external interfaces; national business support hub (level 1 BOSS) interface, data business management platform ( DSMP) interface. The middleware service layer includes a non-domain middleware server group composed of middleware servers 1-4, and a domain-based middleware server group composed of middleware servers 5 and 6. The server in the background database layer provides business database, account database, list query database. Domain name servers include DNS server 1 and DNS server 2, which are mutually backup. The front-end terminal layer, the middleware service layer, and the domain name server are connected through the BOSS network.

Claims (8)

1. professional middleware services load-balancing method, comprise preceding station terminal in the three-layer architecture system based on professional middleware, carry out the middleware services and the background data base of Business Processing, the server group that middleware services adopts 2 above middleware servers to form realizes, it is characterized in that: the name server of being responsible for foreground terminal domain name access is set, on name server, move access control program, this program is used for according to the load balancing control strategy of setting foreground terminal domain name access request being resolved control, the load balancing implementation procedure may further comprise the steps under the control resolving

Step 1, preceding station terminal are called the middleware server domain name and are carried out service access, initiate the middleware services call request;

Step 2, access control program to middleware server domain name analysis, obtains middleware server IP address by IP address mapping relation orientation according to the load balancing control strategy of setting, and it is returned to preceding station terminal;

Step 3, preceding station terminal are received middleware server IP address, middleware services on the corresponding server in the invoking server group;

Step 4, middleware services visit background data base carries out Business Processing, and returns result and give preceding station terminal.

2. professional middleware services load-balancing method as claimed in claim 1 is characterized in that: described load balancing control strategy comprises following three aspects,

Balanced access strategy is used for the middleware services call request that preceding station terminal is initiated is directed in turn the middleware server of server group, with each middleware server that is assigned to of middleware load balancing;

Failover policies, the IP redirects of this server that is used for will leading under the situation of certain middleware server disorderly closedown realize the failover of middleware services to other server of operate as normal;

Newly add strategy, dynamically it is added to the server group when being used for increasing new middleware server, middleware is loaded on balanced distribution the in the server group.

3. professional middleware services load-balancing method as claimed in claim 1 or 2, it is characterized in that: the load balancing control strategy is stored on the name server in the configuration file mode, calls for access control program.

4. professional middleware services load-balancing method as claimed in claim 1 or 2 is characterized in that: access control program adopts encapsulation WIN DNS service operations API to carry out technology and realizes.

5. professional middleware services load-balancing method as claimed in claim 1 or 2 is characterized in that: described middleware services adopts the Tuxedo technology to realize.

6. professional middleware services load-balancing method as claimed in claim 1 or 2 is characterized in that: the BOSS system that is used for mobile service provider.

7. professional middleware services load-balancing method as claimed in claim 6 is characterized in that: name server inserts the BOSS system by couple in router.

8. professional middleware services load-balancing method as claimed in claim 1 or 2 is characterized in that: adopt two name servers that are equipped with mutually.

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